Dell 14" Mobile Precision 3470 Mobile Workstation (Silver) - Manual (Page 85)

3. Remove the base cover .
4. Remove the wireless card .
5. Remove the display assembly .
6. Remove the display bezel .
7. Remove the display panel .
About this task
NOTE: This procedure applies only to computers shipped with a sensor board.
The following image indicates the location of the sensor board and provide a visual representation of the removal procedure.
Steps
1. Open the latch and disconnect the LED cable from connector on the sensor board.
2. Gently lift the sensor board away from the display back cover.
Installing the sensor board
About this task
The following image indicates the location of the sensor board and provide a visual representation of the removal procedure.
Removing and installing components 85